کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
499108 863027 2009 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Perturbation-based successive approximate topology optimization for a displacement minimization problem
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
پیش نمایش صفحه اول مقاله
Perturbation-based successive approximate topology optimization for a displacement minimization problem
چکیده انگلیسی

This paper discusses a new approach for displacement-based topology optimization of continuum. Topology optimization of continuum can be performed with the optimization of material distribution. This optimization problem will include a large number of design variables, and it may require a high computational cost, especially for computation of gradient components with respect to an objective function and determination of an appropriate updating increment. A conventional approximate optimization technique may not be effective for this problem because it is a very large-scale problem.From this viewpoint, a new optimization technique, which is based on a successive approximation algorithm, is proposed. The proposed method consists of two main processes: (1) a linear approximation for determination of an updating direction, and (2) a nonlinear approximation for determining a scale coefficient of the updating vector. The first approximation is performed using the perturbation-based finite element analysis, and the second approximation is performed using the Kriging Method.In order to investigate effectiveness of the proposed method, it is applied to some typical examples for topology optimization problem. From the numerical results, effectiveness and validity of the proposed method are discussed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computer Methods in Applied Mechanics and Engineering - Volume 199, Issues 1–4, 1 December 2009, Pages 148–157
نویسندگان
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